Change supported os family to 'Debian'
Change supported os family to 'Debian'

Check that os family is 'Debian' instead of
'Ubuntu'.

Change-Id: I0c8754c38b0207206d6e26bf284925c0ff79fe67
Closes-bug: #1387383

Metaswitch/fuel-library,Metaswitch/fuel-library,xarses/fuel-library,SmartInfrastructures/fuel-library-dev,zhaochao/fuel-library,ddepaoli3/fuel-library-dev,ddepaoli3/fuel-library-dev,huntxu/fuel-library,eayunstack/fuel-library,huntxu/fuel-library,zhaochao/fuel-library,eayunstack/fuel-library,zhaochao/fuel-library,stackforge/fuel-library,SmartInfrastructures/fuel-library-dev,ddepaoli3/fuel-library-dev,SmartInfrastructures/fuel-library-dev,huntxu/fuel-library,zhaochao/fuel-library,SmartInfrastructures/fuel-library-dev,stackforge/fuel-library,stackforge/fuel-library,Metaswitch/fuel-library,ddepaoli3/fuel-library-dev,stackforge/fuel-library,eayunstack/fuel-library,huntxu/fuel-library,Metaswitch/fuel-library,xarses/fuel-library,xarses/fuel-library,eayunstack/fuel-library,SmartInfrastructures/fuel-library-dev,zhaochao/fuel-library,eayunstack/fuel-library,xarses/fuel-library,ddepaoli3/fuel-library-dev,huntxu/fuel-library